IT’S RACE DAY!  MAY 27, 2024


Participant enthusiasm exceeded our wildest expectations.

There are a limited number of spots available (no shirt or snack bag).

You can register in person at the start line, 30th and Walnut St., Boulder, CO,

5:30am – 9:00am (or until we reach our maximum capacity)


Watch on TV, online or in person! 
See every turn with thousands of screaming fans, the pro-race, skydivers, flyover and the Memorial Day Tribute.

Live updates starting at 5am throughout the morning, and full coverage of the Pro Race Challenge and Memorial Day Tribute from 11am to 12:30pm.

Watch throughout the morning with live streaming on our YouTube Channel!

Live at Folsom Stadium

Everyone is welcome at CU stadium to watch finishers, the Pro Race finish, and Memorial Day Tribute.  (11am -12:30pm).

Live at the International Team Challenge

Be at the start line at 11am when our pro athlete teams begin their quest. Start area is Folsom and Taft.

Feet Above Sea Level

2023 Participants


Kilometers of Heaven

We’ve Got Your Back

Your Bolder GuaRUNtee.

If you sign up for the BOLDERBoulder and don’t participate, we will roll your registration over to next year’s BOLDERBoulder for $30.

Learn more ->

No hidden fees.

We know how you like to be treated. We are committed to transparency and no hidden fees.

Learn more ->

Official Presenting Sponsor


Official Running Footwear and Running Apparel

Avery Brewery

Official Beer

King Soopers

Official Snack Bag and Grocery


Official Insurance

Photo credit: Glen Delman, John Wark, Jan McLoughlin, John Klein, Vanessa Cote, and Gameface Media